Index: kernel/arch/arm32/src/mach/beagleboardxm/beagleboardxm.c
===================================================================
--- kernel/arch/arm32/src/mach/beagleboardxm/beagleboardxm.c	(revision ecd1a0aa0746649b810764037fa03dca950f5122)
+++ kernel/arch/arm32/src/mach/beagleboardxm/beagleboardxm.c	(revision ecd1a0aa0746649b810764037fa03dca950f5122)
@@ -0,0 +1,259 @@
+/*
+ * Copyright (c) 2012 Jan Vesely
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+/** @addtogroup arm32beagleboardxm
+ * @{
+ */
+/** @file
+ *  @brief BeagleBoard-xM platform driver.
+ */
+
+#include <arch/exception.h>
+#include <arch/mach/beagleboardxm/beagleboardxm.h>
+#include <genarch/drivers/amdm37x_irc/amdm37x_irc.h>
+#include <genarch/drivers/amdm37x_uart/amdm37x_uart.h>
+#include <genarch/drivers/amdm37x_gpt/amdm37x_gpt.h>
+#include <genarch/drivers/amdm37x_dispc/amdm37x_dispc.h>
+#include <genarch/fb/fb.h>
+#include <genarch/srln/srln.h>
+#include <interrupt.h>
+#include <mm/km.h>
+#include <ddi/ddi.h>
+#include <ddi/device.h>
+
+static void bbxm_init(void);
+static void bbxm_timer_irq_start(void);
+static void bbxm_cpu_halt(void);
+static void bbxm_get_memory_extents(uintptr_t *start, size_t *size);
+static void bbxm_irq_exception(unsigned int exc_no, istate_t *istate);
+static void bbxm_frame_init(void);
+static void bbxm_output_init(void);
+static void bbxm_input_init(void);
+static size_t bbxm_get_irq_count(void);
+static const char *bbxm_get_platform_name(void);
+
+#define BBXM_MEMORY_START	0x80000000	/* physical */
+#define BBXM_MEMORY_SIZE	0x20000000	/* 512 MB */
+
+static struct beagleboard {
+	amdm37x_dispc_regs_t *dispc;
+	amdm37x_irc_regs_t *irc_addr;
+	amdm37x_uart_t uart;
+	amdm37x_gpt_t timer;
+} beagleboard;
+
+struct arm_machine_ops bbxm_machine_ops = {
+	.machine_init = bbxm_init,
+	.machine_timer_irq_start = bbxm_timer_irq_start,
+	.machine_cpu_halt = bbxm_cpu_halt,
+	.machine_get_memory_extents = bbxm_get_memory_extents,
+	.machine_irq_exception = bbxm_irq_exception,
+	.machine_frame_init = bbxm_frame_init,
+	.machine_output_init = bbxm_output_init,
+	.machine_input_init = bbxm_input_init,
+	.machine_get_irq_count = bbxm_get_irq_count,
+	.machine_get_platform_name = bbxm_get_platform_name
+};
+
+static irq_ownership_t bb_timer_irq_claim(irq_t *irq)
+{
+	return IRQ_ACCEPT;
+}
+
+static void bbxm_setup_fb(unsigned width, unsigned height, unsigned bpp)
+{
+	const unsigned pixel_bytes = (bpp / 8);
+	const size_t size = ALIGN_UP(width * height * pixel_bytes, FRAME_SIZE);
+	const unsigned frames = size / FRAME_SIZE;
+	unsigned order = 0;
+	unsigned frame = 1;
+	while (frame < frames) {
+		frame *= 2;
+		++order;
+	}
+	printf("Allocating %d (2^%d) frames.\n", size, order);
+	/* prefer highmem as we don't care about virtual mapping. */
+	void *buffer = frame_alloc(order, FRAME_LOWMEM);
+	ASSERT(buffer);
+
+	amdm37x_dispc_setup_fb(beagleboard.dispc, width, height, bpp,
+	    (uintptr_t) buffer);
+
+	fb_properties_t prop = {
+		.addr = (uintptr_t)buffer,
+		.offset = 0,
+		.x = width,
+		.y = height,
+		.scan = width * pixel_bytes,
+		.visual = VISUAL_RGB_5_6_5_LE
+	};
+	switch (bpp)
+	{
+	case 8:
+		prop.visual = VISUAL_INDIRECT_8; break;
+	case 16:
+		prop.visual = VISUAL_RGB_5_6_5_LE; break;
+	case 24:
+		prop.visual = VISUAL_BGR_8_8_8; break;
+	case 32:
+		prop.visual = VISUAL_RGB_8_8_8_0; break;
+	default:
+		printf("Invalid framebuffer bit depth: bailing out.\n");
+		return;
+	}
+	outdev_t *fb_dev = fb_init(&prop);
+	if (fb_dev)
+		stdout_wire(fb_dev);
+
+}
+
+static void bb_timer_irq_handler(irq_t *irq)
+{
+        /*
+         * We are holding a lock which prevents preemption.
+         * Release the lock, call clock() and reacquire the lock again.
+         */
+	amdm37x_gpt_irq_ack(&beagleboard.timer);
+	spinlock_unlock(&irq->lock);
+	clock();
+	spinlock_lock(&irq->lock);
+}
+
+static void bbxm_init(void)
+{
+	/* Initialize interrupt controller */
+	beagleboard.irc_addr =
+	    (void *) km_map(AMDM37x_IRC_BASE_ADDRESS, AMDM37x_IRC_SIZE,
+	    PAGE_NOT_CACHEABLE);
+	ASSERT(beagleboard.irc_addr);
+	amdm37x_irc_init(beagleboard.irc_addr);
+
+	/* Map display controller */
+	beagleboard.dispc = (void*) km_map(AMDM37x_DISPC_BASE_ADDRESS,
+	    AMDM37x_DISPC_SIZE, PAGE_NOT_CACHEABLE);
+	ASSERT(beagleboard.dispc);
+
+	/* Initialize timer, pick timer1, because it is in always-power domain
+	 * and has special capabilities for regular ticks */
+	amdm37x_gpt_timer_ticks_init(&beagleboard.timer,
+	    AMDM37x_GPT1_BASE_ADDRESS, AMDM37x_GPT1_SIZE, HZ);
+}
+
+static void bbxm_timer_irq_start(void)
+{
+	/* Initialize timer IRQ */
+	static irq_t timer_irq;
+	irq_initialize(&timer_irq);
+	timer_irq.devno = device_assign_devno();
+	timer_irq.inr = AMDM37x_GPT1_IRQ;
+	timer_irq.claim = bb_timer_irq_claim;
+	timer_irq.handler = bb_timer_irq_handler;
+	irq_register(&timer_irq);
+
+	/* Enable timer interrupt */
+	amdm37x_irc_enable(beagleboard.irc_addr, AMDM37x_GPT1_IRQ);
+
+	/* Start timer here */
+	amdm37x_gpt_timer_ticks_start(&beagleboard.timer);
+}
+
+static void bbxm_cpu_halt(void)
+{
+	while (1);
+}
+
+/** Get extents of available memory.
+ *
+ * @param start		Place to store memory start address (physical).
+ * @param size		Place to store memory size.
+ */
+static void bbxm_get_memory_extents(uintptr_t *start, size_t *size)
+{
+	*start = BBXM_MEMORY_START;
+	*size = BBXM_MEMORY_SIZE;
+}
+
+static void bbxm_irq_exception(unsigned int exc_no, istate_t *istate)
+{
+	const unsigned inum = amdm37x_irc_inum_get(beagleboard.irc_addr);
+	amdm37x_irc_irq_ack(beagleboard.irc_addr);
+
+	irq_t *irq = irq_dispatch_and_lock(inum);
+	if (irq) {
+		/* The IRQ handler was found. */
+		irq->handler(irq);
+		spinlock_unlock(&irq->lock);
+	} else {
+		/* Spurious interrupt.*/
+		printf("cpu%d: spurious interrupt (inum=%d)\n",
+		    CPU->id, inum);
+	}
+}
+
+static void bbxm_frame_init(void)
+{
+}
+
+static void bbxm_output_init(void)
+{
+#ifdef CONFIG_FB
+	bbxm_setup_fb(CONFIG_BFB_WIDTH, CONFIG_BFB_HEIGHT, CONFIG_BFB_BPP);
+#else
+	(void)bbxm_setup_fb;
+#endif
+	/* UART3 is wired to external RS232 connector */
+	const bool ok = amdm37x_uart_init(&beagleboard.uart,
+	    AMDM37x_UART3_IRQ, AMDM37x_UART3_BASE_ADDRESS, AMDM37x_UART3_SIZE);
+	if (ok) {
+		stdout_wire(&beagleboard.uart.outdev);
+	}
+}
+
+static void bbxm_input_init(void)
+{
+	srln_instance_t *srln_instance = srln_init();
+	if (srln_instance) {
+		indev_t *sink = stdin_wire();
+		indev_t *srln = srln_wire(srln_instance, sink);
+		amdm37x_uart_input_wire(&beagleboard.uart, srln);
+		amdm37x_irc_enable(beagleboard.irc_addr, AMDM37x_UART3_IRQ);
+	}
+}
+
+size_t bbxm_get_irq_count(void)
+{
+	return AMDM37x_IRC_IRQ_COUNT;
+}
+
+const char *bbxm_get_platform_name(void)
+{
+	return "beagleboardxm";
+}
+
+/**
+ * @}
+ */